WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

H01T　SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES (working of metal by the action of a high concentration of electric current B23H; welding, e.g. arc welding, electron beam welding or electrolytic welding B23K; gas-filled discharge tubes with solid cathode H01J 17/00; electric arc lamps H05B 31/00)

H01T 1/00 Details of spark gaps

H01T 1/02 ・Means for extinguishing arc

H01T 1/04 ・・using magnetic blow-out

H01T 1/06 ・・・with permanent magnet

H01T 1/08 ・・using flow of arc-extinguishing fluid

H01T 1/10 ・・・with extinguishing fluid evolved from solid material by heat of arc

H01T 1/12 ・Means structurally associated with spark gap for recording operation thereof

H01T 1/14 ・Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure (H01T 1/15, H01T 1/16, H01T 1/18 take precedence)

H01T 1/15 ・for protection against excessive pressure

H01T 1/16 ・Series resistor structurally associated with spark gap

H01T 1/18 ・Electrolytic device structurally associated with spark gap

H01T 1/20 ・Means for starting arc or facilitating ignition of spark gap

H01T 1/22 ・・by the shape or the composition of the electrodes

H01T 1/24 ・Selection of materials for electrodes (H01T 1/22 takes precedence)

H01T 2/00 Spark gaps comprising auxiliary triggering means (triggering circuits H01T 15/00)

H01T 2/02 ・comprising a trigger electrode or an auxiliary spark gap

H01T 4/00 Overvoltage arresters using spark gaps (H01T 2/00 takes precedence; overvoltage protection circuits using spark gaps H02H 9/06)

H01T 4/02 ・Details (of spark gaps H01T 1/00)

H01T 4/04 ・Housings (H01T 4/06 takes precedence)

H01T 4/06 ・Mounting arrangements for a plurality of overvoltage arresters

H01T 4/08 ・structurally associated with protected apparatus (with switches H01H 9/14; with fuses H01H 85/44)

H01T 4/10 ・having a single gap or a plurality of gaps in parallel

H01T 4/12 ・・hermetically sealed

H01T 4/14 ・・Arcing horns (associated with insulators H01B 17/46)

H01T 4/16 ・having a plurality of gaps arranged in series

H01T 4/18 ・・Arrangements for reducing height of stocked spark gaps

H01T 4/20 ・・Arrangements for improving potential distribution

H01T 7/00 Rotary spark gaps, i.e. devices having one or more rotating electrodes

H01T 9/00 Spark gaps specially adapted for generating oscillations

H01T 11/00 Spark gaps specially adapted as rectifiers

H01T 13/00 Sparking plugs

H01T 13/02 ・Details

H01T 13/04 ・・Means providing electrical connection to sparking plug (electric connections in general H01R)

H01T 13/05 ・・・combined with interference suppressing or shielding means

H01T 13/06 ・・Covers forming a part of the plug and protecting it against adverse environment

H01T 13/08 ・・Mounting, fixing or sealing of sparking plugs, e.g. in combustion chamber

H01T 13/10 ・・・by bayonet-type connection

H01T 13/12 ・・Means on sparking plugs for facilitating engagement by tool or by hand

H01T 13/14 ・・Means for self-cleaning

H01T 13/16 ・・Means for dissipating heat

H01T 13/18 ・・Means for heating, e.g. for drying

H01T 13/20 ・characterised by features of the electrodes or insulation

H01T 13/22 ・・having two or more electrodes embedded in insulation (for two or more sparks H01T 13/46)

H01T 13/24 ・・having movable electrodes (H01T 13/28 takes precedence)

H01T 13/26 ・・・for adjusting spark gap otherwise than by bending of electrode

H01T 13/28 ・・having spherically shaped electrodes, e.g. ball-shaped

H01T 13/30 ・・・mounted so as to permit free movement

H01T 13/32 ・・characterised by features of the earthed electrode

H01T 13/34 ・・characterised by the mounting of electrodes in insulation, e.g. by embedding

H01T 13/36 ・・characterised by the joint between insulation and body, e.g. using cement

H01T 13/38 ・・Selection of materials for insulation (in general H01B 3/00)

H01T 13/39 ・・Selection of materials for electrodes

H01T 13/40 ・structurally combined with other devices (combined or associated with fuel injectors F02M 57/06; structurally combined with other parts of internal-combustion engines F02P 13/00)

H01T 13/41 ・・with interference suppressing or shielding means

H01T 13/42 ・・with magnetic spark generators

H01T 13/44 ・・with transformers, e.g. for high-frequency ignition

H01T 13/46 ・having two or more spark gaps

H01T 13/462 ・・{in series connection}

H01T 13/465 ・・・{one spark gap being incorporated in the sparking plug}

H01T 13/467 ・・{in parallel connection}

H01T 13/48 ・having means for rendering sparks visible

H01T 13/50 ・having means for ionisation of gap (H01T 13/52 takes precedence)

H01T 13/52 ・characterised by a discharge along a surface

H01T 13/54 ・having electrodes arranged in a partly-enclosed ignition chamber

H01T 13/56 ・characterised by having component parts which are easily assembled or disassembled

H01T 13/58 ・Testing (testing characteristics of the spark in internal-combustion engine ignition F02P 17/12)

H01T 13/60 ・・of electrical properties

H01T 14/00 Spark gaps not provided for in groups H01T 2/00 to H01T 13/00(devices providing for corona discharge H01T 19/00)

H01T 15/00 Circuits specially adapted for spark gaps, e.g. ignition circuits (ignition circuits for internal-combustion engines F02P; electric spark ignition for combustion apparatus F23Q; protection circuits using spark gaps H02H 9/06)

H01T 19/00 Devices providing for corona discharge (for charging electrographic elements G03G 15/02)

H01T 19/02 ・Corona rings

H01T 19/04 ・having pointed electrodes

H01T 21/00 Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs

H01T 21/02 ・of sparking plugs

H01T 21/04 ・・Cleaning (abrasive blasting devices for cleaning sparking-plugs B24C 3/34)

H01T 21/06 ・Adjustment of spark gaps (sparking-plugs having movable electrodes for adjusting the gap H01T 13/26)

H01T 23/00 Apparatus for generating ions to be introduced into non-enclosed gases, e.g. into the atmosphere (discharge tubes with provision for emergence of ions from the vessel H01J 33/00; generating plasma H05H)